This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Buscar en Ayuda

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

I attempted to update to Firefox 6 but my system won't support it. Then I tried upgrading to 4.0 but it automatically tries to upgrade to 6.0.

  • 1 respuesta
  • 3 tienen este problema
  • 5 visitas
  • Última respuesta de cor-el

more options

We are operating with Firefox 3.6.

In order to use our Quickbooks online, they suggested upgrading to Firefox 6.0. I attempted and my system is too old (Mac OS 10.5.8).

So, I tried to download Firefox 4.0. When the download begins it's 6.0 that is attempting to download and once done, there is a circle and slash through the Firefox logo. I can't find a way to upgrade to 4.0.

Any help would be appreciated :) Wen

We are operating with Firefox 3.6. In order to use our Quickbooks online, they suggested upgrading to Firefox 6.0. I attempted and my system is too old (Mac OS 10.5.8). So, I tried to download Firefox 4.0. When the download begins it's 6.0 that is attempting to download and once done, there is a circle and slash through the Firefox logo. I can't find a way to upgrade to 4.0. Any help would be appreciated :) Wen

Todas las respuestas (1)

more options

For an unofficial Firefox 4 compatible version (TenFourFox) that runs on PowerPC Macs with OS X 10.4.11 or OS X 10.5.8 you can look at:

Firefox 3.6.x (Mac OS X 10.4 and later) can be found here: